Aeroplane-undercarriage



Ff L. l'ulLLE-b/IET.4 EROPLANE UNDERC'ARRIGE'.

l APPLICATN FILED APR. l2, i919. LSQQASS, Patented May i8, 1920.

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F. L.GUILLEMET.

AERQPLANE UNDERCARRIAGE.

APPLICATION FILED APR. I2, A1919.

Patented my 18,1920.

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. and -its purpose is, first, to rnake'an aero s .ares Patr ICE.

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AEROPLANE#UNDERCARRIAGE.

Micasa.

To z/l whom it muy concern. lie it known that l, lfnxxooisLnoNmAs (iUILLnain'r, a citi'ffen of the United States, residing at Sun Francisco, in the county of San Francisco and State of California, have invented a new'and useful improvement in Aeroplane-Undercarriages, ot' which the following is? a specification and the accompan ing drawings a part thereof.

lilyI invention relates to a peculiar or special form of Wheels for said undercarriage,

plane take to the air more rapidly, and sec ond, to stop it more shortly on' alighting than obtains, at present, thereby dispensing @with a long .course of 'smooth and uniform ground as now required.

The gist of the invention consists in malting the main wheels eccentric, z'. eccentrically mounted on their aXle,-Whereby the aeroplane is alternately raised and lowered a limited extent when running on the ground. These wheels are the ones usually placed at or near the center of gravity of the aeroplane and may consist of one or more pairs. Any other wheel or Wheels at I either or both endsof the aeroplane need not and axle on it.

be eccentric.. ,A A

ln the drawings, l* igure l is a partial side view of an aeroplane provided. with eccen tc Wheels; Fig. 2 is a 'front view of the saine; Fig. 3 is a. sectional view onlline X--X'of Fig. 2 looking down; Fi 4f is ari-enlarged view of one wheel, (mi e and eranlr removed), and Fig. 5 a horizontal. section through the same Wheel with a crank l have illustrated a set of two pairs of wheels for convenience in case of need; but

it is understood that in the majority of eases" one pair only would do as Well or better. Each pair of Wheels should be :tast with its axle, .so to revolve with it, and all the Wheels in a set should be connected by any suitable means to make them revolve in unison an equal number of turns, with parallelism of eccentric radii.

ln the drawings, the two pairs of Wheels A.. A are connected together by means of the parallel rods B B fitted on the cranks C C; l

the axles D B ,lit in bearings -tormed in a solid frame consisting ofthe rods E ERF F, G G, etc. Each Wheel isprovided Wlth a strong piece orl bar H of appropriate shape for bearing the axle D and the cranlr C. Also, inthe center of this bar, a boss or hub Specification of Letters Patent.

Patented May 1S, 1920i.

Application nled April 12, 1919. Serial No. 289,625.

is.V fastened or made integral and suitable disks or l'mobs l at each end of it are\to hold, the inner end of the wire spokes l J.

The axle D and crank C are held fast on4 'the bar H by Cotter pins. K K, permitting,r

removal if necessary. `When there is only one pair owheels, the parallel rods and cranks are of course dispensed with. The fastening ot the Wheels with their axle would permitV the application of some form of friction clutch or brake on the axles for further shortening stops if convenient.

ln operation, when the propeller has at tained a 'sufiicient speed,.the aeroplane is .released in the usual way and itnvill start hopping as a bird before taking flight. This hopping may somewhat retard the speed of the aerog'ilane forward but will urge it up- `Ward as the propelling ower accumulates, with the angle of incirdnce of the planes CAR intermittently increased and the aeroplane l interinittently raised, thus preventing` it a rising' power While it Will grip a dyingv one. `This same e'ect disappearing for a moment every time the topmostpoint of the eccentrica at the axle is reached, this is when 4Clie aeroplane will leave the ground instead of dropping again.

What l claim as n1 invention and' desire to se mrc by Lettersatent is:

1. An aeroplane undercarriage comprising a frame', a pair of spaced axles carried by the frame tor rotary movement, wheels eccentrically mounted on the terminals of the axles for movement therewith, and a rod connecting thel Wheels together for' syn-l chronous movement.

2. ln an aeroplane underearriage, the lcornn bination of a Wheel including an annular' rim, means providing a bore olset with respect tothe center of the wheel, and radial spokes connecting. .said rim to the central portion of the Wheel; an axle extending into the said here of said wheel; and. means con1 imparted thereto upon rotation of the wheel on *the ground.

3. ln an aeroplane undercarriage, the cornbination of a wheel including anannular rini, a (liaznetrically disposedY brace connected to :said rim and providing a bore otlset with respect to the' center of the wheel, radially disposed spokes connected to the rim, and means connecting said spoken to said brace; an axle extending into the said bore of lsaid Wheel; and means connecting said axle to the body of the aeroplane` whereby .an undulating motion is imparted thereto upon rotation of the wheel on the ground.

ln an aeroplane undercarriaggg'e7 the coinhination oi' a pair of circular ground wheels `having collinear centersz an axle 'eccentrically omineotd to both of Enid wheels in subaxle, to the body of the aero-t maires a frame revolublv supporting said axle beneath the aeroplane body.

5. In an'aeroplixne under 'arriage,tl1e'coni bination of afpar of circular ground wheels having collinear centers, and means connecting saidwheels to the aeroplane body to impart to the latter an undulating motion during travel of said wheele,I over the ground.

6. In an aeroplane undercarrage, the combination of -a circular g f1'oundwheel.` and means having connection to said wheelv eccentrically thereof and to the aeroplane body for imparting an undulating movement to the body upon 'rotation of said wheel over the ground.v

F. LQOXIDAS GUILLEME'I. Witnesses:

Gr.v T. BRACKETT, R. A. GUiLLEME'r. 

